In a global economy, currency fluctuations will not make a difference in the long run. Aside from that, there are numerous other factors that determine price far more than currency fluctuations, such as supply, demand, competition, production costs, automation, etc.

Interestingly, the price of the Audi A6 in the US is cheaper than in Germany (despite being built in Germany) and despite the exchange rate being vastly in favor of the Euro.

Canon is simply trying to see what they can get away with. Maybe they can, maybe they will shoot into their own foot.

No doubt they will “get away with it” for a while, then the price will drop closer to $3000. The Nikon will probably drop as well (the famous “instant rebates” will show up eventually). To some extent it would appear that they are pricing this thing to what they see as its perceived value. The 1DsIII was not too different from the 5DIII in terms of what it brought to the table feature wise and they got $7k for that thing. From that perspective, this one comes in at half the price while only losing a bit of "build quality".

For all the saber rattling between the two fanboy camps, these huge, immense differences in IQ that are
clearly
evident even on the most casual review of the speculation sheet are going to be minimal at best in actual photographs.